Yes, because that euphemistic language is there to lighten the blow. "unalive" is an attempt to bypass a social media filter and speaks to the shift in how and why words enter our lexicon.
Well, because "suicide" isn't profane. It might be considered a pseudo-profanity, but people don't stop saying swearing because of profanity filters. This is an instance where the filter is feeding back into the zeitgeist.